Preparation of polyoxyalkylene-alpha,omega-dicarboxylic acids
US5256819A · kind A · utility
11Cited by
9References
22Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 24, 1992 |
| Grant date | Oct 26, 1993 |
| Priority date | — |
| Expiry date | Dec 24, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G65/324
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for the preparation of a polyoxyalkylene-alpha,omega-dicarboxylic acid by reacting the corresponding polyoxyalkylene glycol with a stable free radical nitroxide in the presence of a NO.sub.x -generating compound and optionally, an oxidant and/or a solvent, at a temperature in the range of from about 0.degree. C. to about 100.degree. C. and thereafter separating out the polyoxyalkylene-alpha,omega-dicarboxylic acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.